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SC Filed 2022-01-14 Event — SEC 0000935836-22-000017 →

EcoR1 Capital, LLC PROTHENA CORP PUBLIC LTD CO PRTA

Stake: Shares:

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)
19 transactions
8 buys · 5 sales · 5 awards/exercises
Issuer Cluster
2 13D/G filings on this issuer
1 other filing besides this one
Filer Track Record
13 filings by this filer
12 other filings in the data moat
Short Interest · settle 2026-07-15
DTC 16.40
8,196,964 shares short · -2.1% vs prior

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2026-07-28 Zago Wagner M. officer Option exercise 51,000
2026-07-28 Zago Wagner M. officer Disposition 51,000 $8.56 $437K
2026-07-28 Walker Karin L officer Option exercise 15,000
2026-07-28 Walker Karin L officer Disposition 15,000 $8.56 $128K
2026-07-28 Swanson Chad J. officer Option exercise 51,000
2026-07-28 Swanson Chad J. officer Disposition 40,800 $8.56 $349K
2026-07-28 Swanson Chad J. officer F 3,467 $8.56 $30K
2026-07-28 Smith Brandon S. officer Option exercise 78,000
2026-07-28 Smith Brandon S. officer Disposition 78,000 $8.56 $668K
2026-07-28 Nguyen Tran officer Option exercise 57,000
2026-07-28 Nguyen Tran officer Disposition 57,000 $8.56 $488K
2026-06-04 SCULLY WILLIAM P 10%+ owner Buy 50,000 $9.31 $465K
2026-05-15 WELCH DANIEL G director Award 27,000 $9.76 $264K
2026-05-15 Selkoe Dennis J. director Award 27,000 $9.76 $264K
2026-05-15 Ekman Lars director Award 27,000 $9.76 $264K
2026-05-15 Dunn William H. Jr. director Award 27,000 $9.76 $264K
2026-05-15 Cooke Shane director Award 27,000 $9.76 $264K
2026-05-15 COLLIER RICHARD T director Award 27,000 $9.76 $264K
2026-04-10 Kingston Anne Evans officer Award 100,000 $10.50 $1.05M

Other 13D/G Filings on PROTHENA CORP PUBLIC LTD CO

FiledFormFilerStakeShares
2025-01-03 SCHEDULE EcoR1 Capital, LLC 21.50% 11,584,280 view →

Other Filings by EcoR1 Capital, LLC

FiledFormIssuerStakeShares
2026-07-20 SCHEDULE 13G Alto Neuroscience, Inc. view →
2026-06-25 SCHEDULE 13G Fulcrum Therapeutics, Inc. FULC view →
2026-06-25 SCHEDULE 13G Fulcrum Therapeutics, Inc. FULC view →
2026-06-16 SCHEDULE 13G Eloxx Pharmaceuticals, Inc. ELOX view →
2025-05-19 SCHEDULE GALAPAGOS NV GLPGF 11.84% 7,803,202 view →
2025-03-17 SCHEDULE Zymeworks Inc. ZYME 24.20% 16,858,418 view →
2025-02-18 SCHEDULE Zymeworks Inc. ZYME 22.80% 15,720,161 view →
2025-01-13 SCHEDULE Zymeworks Inc. ZYME 22.40% 15,411,078 view →
2025-01-03 SCHEDULE PROTHENA CORP PUBLIC LTD CO PRTA 21.50% 11,584,280 view →
2024-10-08 SC GALAPAGOS NV GLPGF view →
2021-05-11 SC ANAPTYSBIO, INC ANABV view →
2021-04-13 SC ANAPTYSBIO, INC ANABV view →

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